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摘要：
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六角抽孔螺栓头部具有较深的内孔，使得其工艺设计成为难点，针对该问题提出一种六角抽孔螺栓多工位冷镦成形工艺。利用有限元模拟软件Deform-3D，对六角抽孔螺栓的多工位冷镦成形过程进行了数值模拟，分析了零件成形过程中的载荷-行程曲线、等效应力、等效应变及损伤值分布，最后进行了工艺试验。研究结果表明：提出的多工位冷镦成形工艺是可行的，模拟得到的冷镦件充填饱满，在成形工位2、工位3和工位4时载荷值较大，分别为429，826和380 kN；损伤值最大为0.38，小于40Cr钢的临界损伤值0.42，不容易产生裂纹。工艺试验得到的产品和模拟结果具有较好的一致性，冷镦件尺寸一致性较好，说明工艺可靠，对该类零件的多工位冷镦成形工艺具有一定的指导意义。
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Six-angle hole bolt has a deep inner hole to make its technological design difficulty. For this problem, a multi-station cold upsetting process for six-angle hole bolt was presented, and the multi-station cold upsetting process for six-angle hole bolt was simulated by finite element simulation software Deform-3D. Then, the load-stroke curve as well as the distributions of equivalent stress, equivalent strain and damage value in the forming process were analyzed, and the experiment was conducted to validate the simulation results finally. The research results show that the multi-position cold upsetting process is feasible, and the simulated cold upsetting parts are filled fully. However, the loading values are larger at station 2, station 3 and station 4, which are 429，826 and 380 kN respectively, the maximum damage value 0.38 is less than the critical damage value 0.42 of 40Cr, and the crack is not easy to generate. Furthermore, the products obtained in the experiment and the simulation results have a good consistency, and the size consistency of cold upsetting part is better. The results shows that the multi-station cold upsetting process for six-angle hole bolt is reliable, which has a certain directive significance to the multi-station cold upsetting technology of this kind of parts.
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基金项目：
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郑州市科技重大专项资金（152PZDZX007）
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作者简介：
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刘光辉(1989-), 男, 硕士，工程师，E-mail：liu0406gh@163.com；通讯作者：刘华（1962-），男，博士，博士生导师，研究员，E-mail：13903832971@163.com
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参考文献：
|
[1]李英亮.紧固件概论[M].北京:机械工业出版社,2014.
Li Y L. Introduction of Fasteners [M]. Beijing: China Machine Press,2014.
[2]肖志玲,刘百宣,刘华,等.销钉多工位冷镦成形过程数值模拟及组织演变[J].热加工工艺,2014,43(17):119-121，124.
Xiao Z L,Liu B X,Liu H, et al. Numerical simulation and microstructure evolution on multi-station cold heading of pin[J]. Hot Working Technology, 2014,43(17):119-121, 124.
[3]赵德颖，张连东，朱恩领. 枝杈类锻件挤压成形折叠缺陷影响参数分析 [J].塑性工程学报，2018,25（1）：41-45.
Zhao D Y, Zhang L D, Zhu E L. Analysis of affecting parameters on folding defects of branch-type forgings in the process of extrusion [J].Journal of Plasticity Engineering，2018,25（1）：41-45.
[4]林新波. DEFORM-2D 和DEFORM-3D CAE 软件在模拟金属塑性变形过程中的应用[J].模具技术,2000, (3)：75-80.
Ling X B. Application of DEFORM-2D and DEFORM-3D CAE program to simulation of metal plastic defomation [J]. Die and Mould Technology, 2000, (3)：75-80．
[5]钟少基, 黄诗君. 基于数值模拟的厚板精冲件剪切面缺陷研究[J]. 塑性工程学报, 2018,25（2）: 79-85.
Zhong S J, Huang S J. Study on shear surface defects of heavy plate blanking parts based on numerical simulation[J].Journal of Plasticity Engineering, 2018,25（2）: 79-85.
[6]李传民,王向丽,闫华军,等.金属成形有限元分析实例指导教程[M].北京:机械工业出版社,2007.
Li C M, Wang X L, Yan H J, et al. Examples of Metal Forming Finite Element Analysis Tutorial[M]. Beijing: China Machine Press, 2007.
[7]林新波,李荣先, 柳百成, 等. 基于数值模拟的工艺评估与优化[J].塑性工程学报，2005,12(1):58-63.
Lin X B, Li R C, Liu B C, et al. Process evaluation and optimization based on numerical simulation[J].Journal of Plasticity Engineering, 2005,12(1):58-63.
[8]肖红生,林新波,张质良.轴径零件温-冷精锻综合成形工艺及有限元仿真[J].机械科学与技术,2000,19(16):964-966.
Xiao H S, Lin X B, Zhang Z L. Precision forging of rear axle spindle and its FEM simulation [J]. Mechanical Acience and Technology, 2000, 19(16):964-966.
[9]GB/T 18685—2017,普通螺纹搓制和滚制前的毛坯直径[S].
GB/T 18685—2017, The blank diameters for rolling general purpose metric srew threads[S].
[10]胡建军,李小平.Deform-3D 塑性成形CAE教程[M].北京：北京大学出版社，2011.
Hu J J, Li X P. Deform-3D Plastic Forming CAE Application Tutorial[M].Beijing: Peking University Press,2011.
[11]石玉萍.1Cr13马氏体不锈钢热加工基础研究及锻造工艺模拟[D].太原：太原科技大学，2013.
Shi Y P. Study on Basic Thermal Process of 1Cr13 Martensitic Stainless Steel and Forging Process Simulation[D]. Taiyuan: Taiyuan University of Science and Technology, 2013.
[12]项建英，宋仁伯，任培东. 316L不锈钢动态再结晶行为[J].北京科技大学学报，2009,31（12）：1555-1559.
Xiang J Y, Song R B, Ren P D. Dynamic recrystallization behavior of 316L stainless steel[J]. Journal of University of Science and Technology Beijing, 2009, 31(12):1555-1559.
[13]权国政，李贵胜，王阳，等.温度及应变速率对Ti-6Al-2Zr-1Mo-1V合金临界损伤因子的影响[J].材料热处理学报，2013,34（1）：175-181.
Quan G Z, Li G S, Wang Y, et al. Effect of different temperatures and strain rates on critical damage factor of Ti-6Al-2Zr-1Mo-1V alloy[J].Transactions of Meterials and Heat Treatment,2013,34(1):175-181.
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